Turn (one's) back on (sth/sone) (Short video)

The phrase of the day is: "Turn (one's) back on (sth/sone)"

• To refuse to accept something (or someone) that you have previously accepted.
  [ --- He said the country could not turn its back on globalization. --- ]
  
• To refuse to help someone.
  [ --- After becoming a successful writer, Jim turned his back on all the people he used to know back home. --- ]